How does this scenario make any sense? If the United States had laid a trap for the Japanese at Pearl Harbor and sprung it before the Japanese could mount their strike, then the cream of the Japanese Imperial Navy would have been in total ruins and the war would have been effectively over before it even started. Had this occurred instead of the "surprise" attack at Pearl Harbor, it's very unlikely that the American people would have supported a total war policy against Japan and the other Axis powers.
Roosevelt had to have his Pearl Harbor event to justify full American entry into that war. Nothing less than an "unprovoked, surprise attack" and a few burning battleships would have sufficed to accomplish that.